I was supposed to fly LUG-ZRH-GRU on Saturday, June 1st. Was informed early Saturday and was rebooked to LUG-ZRH (overnight) ZRH-BCN-GRU with arrival 14 hours late.
I then looked up myself for alternatives and after many calls managed rebook via LUG-ZRH-FRA-GIG-GRU, arriving only 3 hours later than original schedule (but having to leave 4 hours before).
To those affected, I suggest to also look for flights to Rio as they have better availability than those to Sao Paulo. It looks like LX 92 is cancelled on June 3rd and 6th.